#define OLC_PGE_APPLICATION
#include "olcPixelGameEngine.h"

class Example : public olc::PixelGameEngine
{
public:
	Example()
	{
		sAppName = "Example";
	}

private:
	int world[200][160];
	int screen[100][80];
	int screenPosX = 100;
	int	screenPosY = 80;
	int cursor = 2;
public:
	bool OnUserCreate() override
	{
		//Called once at the start, so create things here
		for (int x = 0; x < 200; x++)
			for (int y = 0; y < 160; y++)
				world[x][y] = 1;
		return true;
	}

	bool OnUserUpdate(float fElapsedTime) override
	{
		//Called once per frame
		//update screen
		for (int x = screenPosX; x < screenPosX + 100; x++)
			for (int y = screenPosY; y < screenPosY + 100; y++)
			{
				switch (world[x][y])
				{
				case 1: Draw(x, y, olc::GREY);
					break;
				case 2: Draw(x, y, olc::DARK_GREY);
					break;
				case 3: Draw(x, y, olc::YELLOW);
					break;
				}
				//draw cursor
				if (x == GetMouseX() && y == GetMouseY())
				{
					switch (cursor)
					{
					case 1: Draw(x, y, olc::GREY);
						break;
					case 2: Draw(x, y, olc::DARK_GREY);
						break;
					case 3: Draw(x, y, olc::YELLOW);
						break;
					}
				}
				//Update world with cursor
				if (x == GetMouseX() && y == GetMouseY() && GetMouse(0).bHeld)
				{
					switch (cursor)
					{
					case 1: world[x][y] = 1;
						break;
					case 2: world[x][y] = 2;
						break;
					case 3: world[x][y] = 3;
						break;
					}
				}
			}
		//input
		//choose tile
		if (GetKey(olc::K1).bReleased)
			cursor = 2;
		if (GetKey(olc::K2).bReleased)
			cursor = 3;
		if (GetKey(olc::K3).bReleased)
			cursor = 1;
		//pan view
		if (GetKey(olc::W).bReleased)
			screenPosY -= 200;
		if (GetKey(olc::A).bReleased)
			screenPosX -= 1;
		if (GetKey(olc::S).bReleased)
			screenPosY += 200;
		if (GetKey(olc::D).bReleased)
			screenPosX += 1;

		//update world
		for (int x = 0; x < 200; x++)
			for (int y = 0; y < 160; y++)
			{

			}

		return true;
	}
};


int main()
{
	Example demo;
	if (demo.Construct(100, 80, 8, 8))
		demo.Start();

	return 0;
}